Reference, Installation, and Operations Manual

Section 7: Maintenance and troubleshooting

3-9000-743 Rev S

June 2013

 

 

 

7.6Maintenance logs and reports

To monitor the health of the Daniel 3400 Series Gas Ultrasonic Flow Meter, and ensure it is operating within acceptable specifications, routine diagnostics should be performed. The results of these diagnostic checks should be trended to indicate changes from the original installation of the meter, or over time. Looking at a single inspection report, that is either collected monthly or quarterly, can give you an indication of the meter's health.

This is important since many diagnostics change slowly over time. Trending helps identify these changes and makes problems much more obvious than merely viewing a single inspection report. The Trending feature is integral to Daniel CUI (Deluxe Edition) or Daniel MeterLink which allows all important parameters to be trended.

Also, it is recommended that a diagnostic log file be collected after an upset in the system, where a slug of contaminants may have been introduced into the system.

In establishing a baseline to be used for the trending of the meter diagnostics, it is very helpful if a set of log files are collected immediately after the meter has been installed in the field. Preferably, collect the log files at several velocities within the operating range of the meter. This helps establish that the flow profile is relatively constant throughout the meters operating range (except velocities below 3 ft/sec where the profile may vary).

Table 7-4 Maintenance log collection
Collection rateMaximum Duration (based on 3600 records)

 

 

Best Speed

n/a

 

 

5 sec.

300 min (5 hours)

 

 

10 sec

600 min (10 Hours)

 

 

30 sec.

1800 min (30 hours or 1.25 days)

 

 

1 min

3600 min (60 Hours or 2.5 days)

 

 

5 min

18000 min (300 Hours or 12.5 days)

 

 

Maintenance logs and reports

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